Thanks. I'll look into that on the working and non-working cards and report back with an update. I hadn't heard of perldiag before, but even if I had, it wouldn't have helped me as C (I'm assuming it's C) is a language I don't speak and the code you have shown is, I'm sorry to say, incomprehensible to me. But I can see that copying files would not have copied environment variables and that this is not only something I can do but something likely to work.
Thanks again and regards,
Update as promised: All the environment variables I could find, whether in Linux or Perl, were the same on both cards. The Perl ones seemed to be straight copies of the Linux ones. I was looking in %ENV. Are there other places that Perl environment variables are kept?
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